document.write( "Question 1174293: Jack is 3 years younger than twice Mary's age . If the sum of their ages is 90 , how old is Mary ? \n" ); document.write( "
Algebra.Com's Answer #799711 by ewatrrr(24785)\"\" \"About 
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document.write( "Jack is 3 years younger than twice Mary's age 'x'\r\n" );
document.write( "  x + (2x-3) = 90  ⇒  3x = 93  and x = 31, Mary's Age\r\n" );
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